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CaO-MgO-Al2O3-SiO2 microcrystalline glass and preparation method thereof

A technology of glass-ceramics and glass pellets, which is applied in the field of CaO-MgO-Al2O3-SiO2 glass-ceramics materials, can solve problems such as crystallization difficulties of glass-ceramics, reduce crystallization activation energy, enhance crystallization ability, The effect of simplifying the preparation process

Inactive Publication Date: 2011-09-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a CaO-MgO-Al containing mixed crystal nucleating agent 2 o 3 -SiO 2 Glass-ceramic and its preparation method, the present invention can effectively improve the problem of difficult crystallization in the process of preparing glass-ceramic

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  • CaO-MgO-Al2O3-SiO2 microcrystalline glass and preparation method thereof
  • CaO-MgO-Al2O3-SiO2 microcrystalline glass and preparation method thereof
  • CaO-MgO-Al2O3-SiO2 microcrystalline glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028]Embodiment 1, a kind of CaO-MgO-Al containing mixed crystal nucleating agent 2 o 3 -SiO 2 Glass-ceramic:

[0029] First prepare glass pellets, the composition of which is: SiO 2 50%, MgO 6wt%, CaO 18wt%, Al 2 o 3 12wt%, Na 2 O 3wt%, K 2 O 2wt%, CaF 2 8%, Sb 2 o 3 1wt%. In addition, 3 wt% TiO2 was added. Each of the above-mentioned raw materials needs to pass through a 100-mesh sieve.

[0030] Then proceed to the following steps in sequence:

[0031] 1), according to the above ratio of glass pellets and TiO 2 Mix thoroughly and evenly, then place in a furnace and heat to 1450°C to melt and keep warm for 4 hours to obtain a clear and uniform molten glass.

[0032] 2) Pour the clear and uniform molten glass into the mold for molding, and anneal at 500°C for 0.5h to eliminate internal stress, and obtain a sheet-shaped mother glass with a thickness of 6mm.

[0033] 3) Process the undecrystallized transparent glass sheet (namely the above-mentioned mother gla...

Embodiment 2

[0035] Embodiment 2, a kind of CaO-MgO-Al containing mixed crystal nucleating agent 2 o 3 -SiO 2 Glass-ceramic:

[0036] First prepare glass pellets, the composition of which is: SiO 2 50%, MgO 6wt%, CaO 18wt%, Al 2 o 3 12wt%, Na 2 O 3wt%, K 2 O 2wt%, CaF 2 8%, Sb 2 o 3 1wt%. In addition, add 3wt%P 2 o 5 . Each of the above-mentioned raw materials needs to pass through a 100-mesh sieve.

[0037] Then proceed to the following steps in sequence:

[0038] 1), according to the above ratio of glass pellets and P 2 o 5 Mix thoroughly and evenly, then place in a furnace and heat to 1450°C to melt and keep warm for 4 hours to obtain a clear and uniform molten glass.

[0039] 2) Pour the clarified and uniform molten glass into a mold for molding, and anneal at a temperature of 500°C for 0.5h to eliminate internal stress to obtain a sheet-shaped mother glass; the thickness of the mother glass is 6mm.

[0040] 3) Process the uncrystallized transparent glass sheet (na...

Embodiment 3

[0042] Embodiment 3, a kind of CaO-MgO-Al containing mixed crystal nucleating agent 2 o 3 -SiO 2 Glass-ceramic:

[0043] First prepare glass pellets, the composition of which is: SiO 2 50%, MgO 6wt%, CaO 18wt%, Al 2 o 3 12wt%, Na 2 O 3wt%, K 2 O 2wt%, CaF 2 8%, Sb 2 o 3 1wt%. In addition, add 1.5wt%P 2 o 5 +1.5wt%TiO 2 . Each of the above-mentioned raw materials needs to pass through a 100-mesh sieve.

[0044] Then proceed to the following steps in sequence:

[0045] 1), according to the above ratio of glass pellets and P 2 o 5 、TiO 2 Mix thoroughly and evenly, then place in a furnace and heat to 1450°C to melt and keep warm for 4 hours to obtain a clear and uniform molten glass.

[0046] 2) Pour the clarified and uniform molten glass into a mold for molding, and anneal at a temperature of 500°C for 0.5h to eliminate internal stress to obtain a sheet-shaped mother glass; the thickness of the mother glass is 6mm.

[0047] 3) Process the uncrystallized tra...

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Abstract

The invention discloses a CaO-MgO-Al2O3-SiO2 microcrystalline glass which is composed of glass aggregate and oxide nucleating agent accounting for 3wt% of glass aggregate, wherein the glass aggregate is composed of the following components in percentage by weight: 50-55wt% of SiO2, 6-10wt% of MgO, 15-18wt% of CaO, 10-12wt% of Al2O3, 3-6wt% of Na2O and / or K2O, 8wt% of CaF2 and 1wt% of Sb2O3. The invention simultaneously provides a preparation method of the CaO-MgO-Al2O3-SiO2 microcrystalline glass. In the CaO-MgO-Al2O3-SiO2 microcrystalline glass, nucleating agent of oxide and fluoride is adopted, so that the devitrification activation energy of a system is lowered, a crystal growth index is improved, and the devitrification capability of the microcrystalline glass is greatly enhanced, thereby bringing convenience for preparing the microcrystalline glass with a whole method.

Description

technical field [0001] The present invention relates to the technical field of glass ceramics, more specifically, the present invention relates to a CaO-MgO-Al 2 o 3 -SiO 2 Glass-ceramic material and method for its production. Background technique [0002] Compared with traditional ceramic decorative materials, glass-ceramics decorative materials have the advantages of corrosion resistance, wear resistance, and low water absorption. At present, the glass-ceramics suitable for preparing decorative plates mainly include CaO-Al 2 o 3 -SiO 2 system and CaO-MgO-Al 2 o 3 -SiO 2 system. CaO-MgO-Al 2 o 3 -SiO 2 The performance of glass-ceramic system is better than that of CaO-Al due to the precipitation of diopside crystal phase. 2 o 3 -SiO 2 The system glass-ceramic is more excellent; at present, it is mainly prepared by sintering method, which is not conducive to large-scale promotion due to high production cost and complicated preparation process. [0003] The pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 杨辉郭兴忠杨广跃
Owner ZHEJIANG UNIV
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